hello-world-service/gcube/extra-resources/WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
	version="4.0">
	<display-name>${project.name}</display-name>
	<description>${project.description}</description>
	<servlet>
		<servlet-name>org.gcube.service.helloworld.ResourceInitializer</servlet-name>
	</servlet>
	<servlet-mapping>
		<servlet-name>default</servlet-name>
		<url-pattern>/docs/*</url-pattern>
	</servlet-mapping>
    <servlet-mapping>
		<servlet-name>default</servlet-name>
		<url-pattern>/api-docs/*</url-pattern>
	</servlet-mapping>
	<servlet-mapping>
		<servlet-name>org.gcube.service.helloworld.ResourceInitializer</servlet-name>
		<url-pattern>/*</url-pattern>
	</servlet-mapping>
</web-app>